btrfs: reduce indentation in btrfs_may_alloc_data_chunk

In btrfs_may_alloc_data_chunk() we're checking if the chunk type is of
type BTRFS_BLOCK_GROUP_DATA and if it is we process it.

Instead of checking if the chunk type is a BTRFS_BLOCK_GROUP_DATA chunk
we can negate the check and bail out early if it isn't.

This makes the code a bit more readable.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/volumes.c

@@ -2982,7 +2982,9 @@ static int btrfs_may_alloc_data_chunk(struct btrfs_fs_info *fs_info,
 	chunk_type = cache->flags;
 	btrfs_put_block_group(cache);
 
-	if (chunk_type & BTRFS_BLOCK_GROUP_DATA) {
+	if (!(chunk_type & BTRFS_BLOCK_GROUP_DATA))
+		return 0;
+
 	spin_lock(&fs_info->data_sinfo->lock);
 	bytes_used = fs_info->data_sinfo->bytes_used;
 	spin_unlock(&fs_info->data_sinfo->lock);
@@ -2995,14 +2997,13 @@ static int btrfs_may_alloc_data_chunk(struct btrfs_fs_info *fs_info,
 		if (IS_ERR(trans))
 			return PTR_ERR(trans);
 
-			ret = btrfs_force_chunk_alloc(trans,
-						      BTRFS_BLOCK_GROUP_DATA);
+		ret = btrfs_force_chunk_alloc(trans, BTRFS_BLOCK_GROUP_DATA);
 		btrfs_end_transaction(trans);
 		if (ret < 0)
 			return ret;
 		return 1;
 	}
-	}
+
 	return 0;
 }